bgp_l3vpn_to_bgp_vrf: catch linux setup failures

Signed-off-by: Lou Berger <lberger@labn.net>

tests/topotests/bgp_l3vpn_to_bgp_vrf/customize.py

@@ -93,6 +93,8 @@ CWD = os.path.dirname(os.path.realpath(__file__))
 # test name based on directory
 TEST = os.path.basename(CWD)
 
+InitSuccess = False
+
 class ThisTestTopo(Topo):
     "Test topology builder"
     def build(self, *_args, **_opts):
@@ -136,13 +138,45 @@ class ThisTestTopo(Topo):
         switch[1].add_link(tgen.gears['r2'], nodeif='r2-eth2')
         switch[1].add_link(tgen.gears['r3'], nodeif='r3-eth1')
 
-def doCmd(tgen, rtr, cmd, checkstr = None):
+class CustCmd():
-    output = tgen.net[rtr].cmd(cmd).strip()
+    def __init__(self):
-    if len(output):
+        self.resetCounts()
-        if checkstr != None:
+
-            return re.search(checkstr, output)
+    def doCmd(self, tgen, rtr, cmd, checkstr = None):
-        logger.info('command output: ' + output)
+        output = tgen.net[rtr].cmd(cmd).strip()
-    return None
+        if len(output):
+            self.output += 1
+            if checkstr != None:
+                ret = re.search(checkstr, output)
+                if ret == None:
+                    self.nomatch += 1
+                else:
+                    self.match += 1
+                return ret
+            logger.info('command: {} {}'.format(rtr, cmd))
+            logger.info('output: ' + output)
+        self.none += 1
+        return None
+
+    def resetCounts(self):
+        self.match = 0
+        self.nomatch = 0
+        self.output = 0
+        self.none = 0
+
+    def getMatch(self):
+        return self.match
+
+    def getNoMatch(self):
+        return self.nomatch
+
+    def getOutput(self):
+        return self.output
+
+    def getNone(self):
+        return self.none
+
+cc = CustCmd()
 
 def ltemplatePreRouterStartHook():
     krel = platform.release()
@@ -152,14 +186,16 @@ def ltemplatePreRouterStartHook():
     if tgen.hasmpls != True:
         logger.info('MPLS not available, skipping setup')
         return
+    #collect/log info on iproute2
+    cc.doCmd(tgen, 'r2', 'apt-cache policy iproute2')
+    cc.doCmd(tgen, 'r2', 'yum info iproute2')
+    cc.doCmd(tgen, 'r2', 'yum info iproute')
+
+    cc.resetCounts()
     #configure r2 mpls interfaces
     intfs = ['lo', 'r2-eth0', 'r2-eth1', 'r2-eth2']
     for intf in intfs:
-        doCmd(tgen, 'r2', 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
+        cc.doCmd(tgen, 'r2', 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
-    #collect/log info on iproute2
-    doCmd(tgen, 'r2', 'apt-cache policy iproute2')
-    doCmd(tgen, 'r2', 'yum info iproute2')
-    doCmd(tgen, 'r2', 'yum info iproute')
 
     #configure cust1 VRFs & MPLS
     rtrs = ['r1', 'r3', 'r4']
@@ -170,11 +206,11 @@ def ltemplatePreRouterStartHook():
     for rtr in rtrs:
         router = tgen.gears[rtr]
         for cmd in cmds:
-            doCmd(tgen, rtr, cmd)
+            cc.doCmd(tgen, rtr, cmd)
-        doCmd(tgen, rtr, 'ip link set dev {}-eth4 master cust1'.format(rtr))
+        cc.doCmd(tgen, rtr, 'ip link set dev {}-eth4 master cust1'.format(rtr))
         intfs = ['cust1', 'lo', rtr+'-eth0', rtr+'-eth4']
         for intf in intfs:
-            doCmd(tgen, rtr, 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
+            cc.doCmd(tgen, rtr, 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
         logger.info('setup {0} vrf cust1, {0}-eth4. enabled mpls input.'.format(rtr))
     #configure cust2 VRFs & MPLS
     rtrs = ['r4']
@@ -184,12 +220,19 @@ def ltemplatePreRouterStartHook():
             'ip link set dev cust2 up']
     for rtr in rtrs:
         for cmd in cmds:
-            doCmd(tgen, rtr, cmd)
+            cc.doCmd(tgen, rtr, cmd)
-        doCmd(tgen, rtr, 'ip link set dev {}-eth5 master cust2'.format(rtr))
+        cc.doCmd(tgen, rtr, 'ip link set dev {}-eth5 master cust2'.format(rtr))
         intfs = ['cust2', rtr+'-eth5']
         for intf in intfs:
-            doCmd(tgen, rtr, 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
+            cc.doCmd(tgen, rtr, 'echo 1 > /proc/sys/net/mpls/conf/{}/input'.format(intf))
         logger.info('setup {0} vrf cust2, {0}-eth5. enabled mpls input.'.format(rtr))
+    global InitSuccess
+    if cc.getOutput():
+        InitSuccess = False
+        logger.info('VRF config failed ({}), tests will be skipped'.format(cc.getOutput()))
+    else:
+        InitSuccess = True
+        logger.info('VRF config successful!')
     return;
 
 def ltemplatePostRouterStartHook():
@@ -205,6 +248,10 @@ def versionCheck(vstr, rname='r1', compstr='<',cli=False, kernel='4.9'):
         ret = 'MPLS not initialized'
         return ret
 
+    if InitSuccess != True:
+        ret = 'Test not successfully initialized'
+        return ret
+
     ret = True
     try:
         if router.has_version(compstr, vstr):